package com.sky.mapper;

import com.sky.entity.ShoppingCart;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface ShoppingCartMapper {

    @Select("select * from shopping_cart where user_id=#{userId}")
    List<ShoppingCart> getByUserId(Long userId);

    // 更新购物项数量
    @Update("update shopping_cart set number=#{number} where id = #{id}")
    void updateNumber(ShoppingCart oldShoppingCart);

    // 添加购物项
    void insert(ShoppingCart shoppingCart);

    // 条件查询
    ShoppingCart getOne(ShoppingCart shoppingCart);

    // 清空购物车
    @Delete("delete from shopping_cart where user_id=#{userId}")
    void clean(Long userId);

    // 根据id删除购物车数据
    @Delete("delete from shopping_cart where id = #{id}")
    void deleteById(Long id);
}
